Current work is the main product of a PhD study with the initial working title ‘Sustainable Facilities Management’ at Centre for Facilities Management – Realdania Research, DTU Management 1. December 2008 – 30. November 2011.Here the notion of Public Sustainable Facilities Management (FM) is analysed in the light of a change process in a Danish Municipal Department of Public Property. Three years of Action Research has given a unique insight in the reality in a Municipal Department of Public Property, and as to how a facilitated change process can lead to a more holistic and sustainable practice inspired by the principles of FM.The bottom up change process had an employee perspective, and the work provides answers to the challenges of creating a culture allowing for critical reflections in relation to the impact of FM practice on societal sustainability.